Monroe County, Michigan, Administrator and CFO Michael Bosanac, left, and Luna Pier, Mich., Mayor Dave Davison oversee a pallet of water, donated by a Meijer supermarket, being put into a truck to take to the Luna Pier fire station for distribution to the public, in Luna Pier, Mich., on Aug. 3, 2014. Four Monroe County communities have been told to to not use their water due to toxins in the Toledo water distribution system. (AP Photo/Detroit News, Robin Buckson)

Stories this photo appears in:

Ohio's governor is promising an extensive review of how the water supply for 400,000 people in Ohio and Michigan became tainted with a toxin over the weekend while a high-ranking state lawmaker is planning hearings on the blooms of algae fouling Lake Erie.